"Hiss~ This feeling seems quite magical..." Gu Shanhai, through his innate channel, drew energy from the Holy Grail. He didn't absorb it directly into his body but instead stored it in the natural mark, turning it into a transfer station.
As for the body of the former King, it had long been transformed by him into a solution, which Gu Shanhai had studied and found useless. He didn't partake in Corpse Refinement, and secondly, as a mummy, the various special abilities originally possessed by the dragon descendants did not reside in the flesh but in the soul, leaving only a tough corpse.
And because it was a mummy, it had no nutritional value. Had it possessed even a slight nutritional value, he could have crafted it into a constitution potion or something similar. However, there was none, so he had to deal with it in order to retrieve the Holy Grail.
Keeping it was also not out of the question, but Gu Shanhai worried about potential problems.
